Bactericidal and virucidal fabric
View Patent ↗The present invention provides a bactericidal and virucidal fabric selected from cotton or non-woven fabric prepared by formulations and methods described herein. The formulations include a beta-cyclodextrin-containing compound associated with one or more metal ions including at least zinc ions and water for providing bactericidal and virucidal properties to the fabric dip-coated with the formulations according to various embodiments of the present invention. The as-prepared fabric has an increment in Grams per Square Meter (GSM) value of approximately 13.0 to 20.0 g/m 2 , an antibacterial activity value of at least 3.0, and/or antiviral activity value of at least 2.5.
1. A dip-coating, antibacterial and antiviral formulation for preparing a bactericidal and virucidal fabric, the formulation comprising:
at least a beta-cyclodextrin-containing compound associated with zinc ions, and water to exert bactericidal and virucidal effect of the fabric on bacteria and/or viruses;
at least one organic acid; and
at least one metal salt,
wherein the beta-cyclodextrin comprises at least one carboxylic ester unit and one carboxylic acid unit.
2. The formulation of claim 1 , wherein a first organic acid of the at least one organic acids is ethylenediaminetetraacetic acid and is in a mole ratio of 4:1 to the beta-cyclodextrin.
3. The formulation of claim 2 , wherein a second organic acid of the at least one organic acid is citric acid.
4. The formulation of claim 3 , wherein the at least one metal salt comprises sodium dihydrogen phosphate, sodium hydrogen carbonate, zinc acetate and copper (II) acetate.
5. The formulation of claim 1 , further comprising a vinyl polymer.
6. The formulation of claim 1 , wherein the at least one organic acid is citric acid.
7. The formulation of claim 1 , wherein the at least one metal salt is at least one of copper (II) acetate, zinc acetate, or sodium dihydrogen phosphate.
8. A method of preparing a bactericidal and virucidal fabric comprising:
immersing a fabric into a solution comprising the dip-coating, antibacterial and antiviral formulation of claim 1 ;
padding and drying the fabric to create a bactericidal and virucidal dip-coated fabric capable of reducing bacterial growth and activity from bacteria comprising one or more of Staphylococcus aureus, Klebsiella pneumonia and Escherichia coli , and/or is capable of reducing viral growth and activity from viruses comprising H1N1 and H3N2 strains, and coronavirus.